Preparation of a new green magnetic Fe3O4 @TiO2-P25 photocatalyst for solar advanced oxidation processes in water

López, Jorge; Rey, Ana; Viñuelas-Zahinos, Emilio; Álvarez, Pedro M.

doi:10.1016/j.jece.2023.109999

Cited by 15 publications

(9 citation statements)

References 75 publications

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“…Another study used Fe 3 O 4 @TiO 2 ‐P25 composite which was established as a type‐I heterojunction photocatalyst according to the energy band set‐up values. In this type of photocatalyst, the photogenerated carriers would transfer across the heterojunction interface and accumulate on the Fe 3 O 4 semiconductor and may act as an electron‐hole recombination center [34] . Madima et al.…”

Section: Resultsmentioning

confidence: 99%

“…To the best of our knowledge, Fe 3 O 4 −TiO 2 is a type I heterojunction which is not favorable for photocatalytic applications in terms of causing a higher e‐/h+ recombination rate [32] . In this type of photocatalyst, the photogenerated carriers would transfer across the heterojunction interface and accumulate on the Fe 3 O 4 semiconductor and may act as an electron‐hole recombination center [34] …”

Section: Resultsmentioning

confidence: 99%

“…In this type of photocatalyst, the photogenerated carriers would transfer across the heterojunction interface and accumulate on the Fe 3 O 4 semiconductor and may act as an electron-hole recombination center. [34] Madima et al have prepared Fe 3 O 4 À TiO 2 photocatalysts with different amounts of (% wt. 5, 10, 20, 30, 50, 70) Fe 3 O 4 and they have found similar photoluminescence intensity.…”

Section: Characterization Resultsmentioning

confidence: 99%

“…[32] In this type of photocatalyst, the photogenerated carriers would transfer across the heterojunction interface and accumulate on the Fe 3 O 4 semiconductor and may act as an electron-hole recombination center. [34] In Fe 3 O4À TiO 2 heterojunctions (type I), the photogenerated electrons and holes of TiO 2 transferred to Fe 3 O 4 more easily which makes a higher rate of recombination. [25] However, Pt doping on the TiO 2 surface plays a vital role as an electron acceptor to decrease the e À /h + recombination rate and thus the enhanced photocatalytic activity was obtained with FT-5.0 wt.% Pt.…”

Section: (5 H) This Workmentioning

confidence: 99%

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Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light

Ertis

Kuyumcu

2023

ChemistrySelect

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In this study, Pt doped Fe3O4−TiO2 photocatalysts were synthesized in two steps; (i) Fe3O4−TiO2 (FT) was prepared by the complex‐assisted vapor thermal (VT) method, (ii) Pt was doped to Fe3O4−TiO2 (FT−Pt) by the polyol method. The effect of different amounts of Pt was investigated for photocatalytic hydrogen production. The absorption spectrum of FT with 5.0 % Pt exhibits a surface plasmon resonance (SPR) peak of ∼420 nm which corresponds to the band gap of 2.95 eV. The FT and Pt doped FT samples showed a less intense photoluminescence (PL) band than TiO2 (T) due to the lower e−/h+ recombination rate. By increasing % wt. Pt in the FT samples, PL intensity was decreased. Thus, Pt plays an essential role to hinder the recombination of e−/h+ pairs. Consequently, FT‐5.0 % Pt showed 144 μmol/g‐cat H2 production rate, just about 3.3 times higher than that of FT photocatalyst; due to the suitable band gap energy and the retarded e−/h+ recombination. Therefore, the synergistic effect of Pt and Fe3O4 is found to be beneficial to decrease the e−/h+ recombination rate thus the photocatalytic activity enhancement was achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Resultsmentioning

confidence: 99%

Section: (5 H) This Workmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light

Ertis

Kuyumcu

2023

ChemistrySelect

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“…However, one major challenge encountered with most photocatalysts in powder form is their non-magnetic nature, making them difficult to separate from the purified solution. To address this issue, coupling [ 16 , 17 , 18 , 19 ] magnetic particles with non-magnetic semiconductor photocatalysts appears to be the most logical solution. By incorporating magnetic particles into the hybrid photocatalysts, an external magnetic field can be used to easily separate them after the photocatalytic process, ensuring reusability and offering a promising approach for environmental pollution control.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Carbon Quantum Dots/Iron Oxide Composite Based on Waste Rice Noodle and Iron Oxide Scale: Preparation and Photocatalytic Capability

Ying,

Liu,

Jin

et al. 2023

Nanomaterials

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To provide an economical magnetic photocatalyst and introduce an innovative approach for efficiently utilizing discarded waste rice noodle (WRN) and iron oxide scale (IOS), we initially converted WRN into carbon quantum dots (CQDs) using a hydrothermal method, simultaneously calcining IOS to obtain iron oxide (FeOx). Subsequently, we successfully synthesized a cost-effective, magnetic CQDs/FeOx photocatalytic composite for the first time by combining the resulting CQDs and FeOx. Our findings demonstrated that calcining IOS in an air atmosphere enhanced the content of photocatalytically active α-Fe2O3, while incorporating WRN-based CQDs into FeOx improved the electron-hole pair separation, resulting in increased O2 reduction and H2O oxidation. Under optimized conditions (IOS calcination temperature: 300 °C; carbon loading: 11 wt%), the CQDs/FeOx composite, utilizing WRN and IOS as its foundation, exhibited exceptional and reusable capabilities in photodegrading methylene blue and tetracycline. Remarkably, for methylene blue, it achieved an impressive degradation rate of 99.30% within 480 min, accompanied by a high degradation rate constant of 5.26 × 10−3 min−1. This composite demonstrated reusability potential for up to ten photocatalytic cycles without a significant reduction in the degradation efficiency, surpassing the performance of IOS and FeOx without CQDs. Notably, the composite exhibited strong magnetism with a saturation magnetization strength of 34.7 emu/g, which enables efficient and convenient recovery in photocatalytic applications. This characteristic is highly advantageous for the large-scale industrial utilization of photocatalytic water purification.

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Highly efficient degradation of basic dyes using gold-coated nature-based supermagnetic iron oxide nanoparticles as eco-friendly nanocatalysts

Matar,

Andac

2024

Environ Sci Pollut Res

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Nowadays, organic dyes are prevalent components in wastewater discharges due to their extensive use in various industries, posing a significant threat to public health across different organisms. As a result, wastewater treatment has become an indispensable requirement. In this study, we synthesized supermagnetic iron oxide (Fe3O4 NPs) and gold-iron oxide bimetallic nanoparticles (Au@Fe3O4 BNPs) using an eco-friendly method that involved natural compounds extracted from brown Egyptian propolis. We employed UV-visible spectroscopy, FTIR, XRD, VSM, SEM, HRTEM, EDX, Zeta potential and XPS techniques to examine the optical characteristics, chemical structure, crystalline structure, magnetic properties, morphology, size, and chemical composition of these biosynthesized nanoparticles. Furthermore, these nanoparticles were used as nanocatalysts for the removal of cationic dyes. The photocatalytic results indicated high efficiency in the removal of methylene blue (MB), crystal violet (CV), and malachite green (MG) dyes from aqueous solutions using Fe3O4 NPs and Au@Fe3O4 BNPs. The removal rates of MB, CV, and MG were about 95.2% in 70 min, 99.4% in 50 min, and 96.2% in 60 min for Fe3O4 NPs, and 97.1% in 50 min, 99.1% in 30 min, and 98.1% in 50 min for Au@Fe3O4 BNPs, respectively. The study also assessed the potential anti-radical properties of the extract, Fe3O4 NPs, and Au@Fe3O4 BNPs using the DPPH assay, and the results demonstrated their antioxidant activity. Finally, these Fe3O4 NPs and Au@Fe3O4 BNPs have the potential to serve as efficient antioxidants and photocatalysts for removing basic dyes from water. Graphical abstract

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Preparation of a new green magnetic Fe3O4 @TiO2-P25 photocatalyst for solar advanced oxidation processes in water

Cited by 15 publications

References 75 publications

Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light

Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light

Magnetic Carbon Quantum Dots/Iron Oxide Composite Based on Waste Rice Noodle and Iron Oxide Scale: Preparation and Photocatalytic Capability

Highly efficient degradation of basic dyes using gold-coated nature-based supermagnetic iron oxide nanoparticles as eco-friendly nanocatalysts

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Preparation of a new green magnetic Fe3O4 @TiO2-P25 photocatalyst for solar advanced oxidation processes in water

Cited by 15 publications

References 75 publications

Effect of Different Amounts of Pt on Fe3O4−TiO2 for Photocatalytic H2 Production Under Solar Light

Effect of Different Amounts of Pt on Fe3O4−TiO2 for Photocatalytic H2 Production Under Solar Light

Magnetic Carbon Quantum Dots/Iron Oxide Composite Based on Waste Rice Noodle and Iron Oxide Scale: Preparation and Photocatalytic Capability

Highly efficient degradation of basic dyes using gold-coated nature-based supermagnetic iron oxide nanoparticles as eco-friendly nanocatalysts

Contact Info

Product

Resources

About

Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light

Effect of Different Amounts of Pt on Fe₃O₄−TiO₂ for Photocatalytic H₂ Production Under Solar Light